package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.util.StringUtil;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Service
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //存放从begin到end每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            //日期计算，计算指定日期后一天
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            if (turnover != null) {
                turnoverList.add(turnover);
            } else {
                turnoverList.add(0.0);
            }
        }


        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }


    /**
     * 用户统计
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {

        //存放从begin到end每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            //日期计算，计算指定日期后一天
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Integer> newUserList = new ArrayList<>();
        List<Integer> totalUserList = new ArrayList<>();
        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Map map = new HashMap();
            map.put("end", endTime);
            Integer totalUser = userMapper.countByMap(map);
            map.put("begin", beginTime);
            Integer newUser = userMapper.countByMap(map);

            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }


        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .build();
    }


    /**
     * 订单统计
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {

        //存放从begin到end每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            //日期计算，计算指定日期后一天
            begin = begin.plusDays(1);
            dateList.add(begin);
        }


        List<Integer> orderCountList = new ArrayList<>();
        List<Integer> validOrderCountList = new ArrayList<>();
        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            //查询每天订单数 selece count(id) from orders where order_time $lt; begin

            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("status", null);
            map.put("end", endTime);
            Integer orderCount = orderMapper.countByMap(map);
            map.replace("status", Orders.COMPLETED);
            Integer validOrderCount = orderMapper.countByMap(map);

            validOrderCountList.add(validOrderCount);
            orderCountList.add(orderCount);
        }

        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        Double orderCompletionRate = 0.0d;
        if (totalOrderCount != 0) {
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }


        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .orderCompletionRate(orderCompletionRate)
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .build();
    }

    /**
     * 查询销量排名前10
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");

        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(numbers, ",");
        return SalesTop10ReportVO.builder().nameList(nameList).numberList(numberList).build();
    }


    /**
     * 导出运营数据报表
     *
     * @param response
     */
    @Override
    public void exportBussinessData(HttpServletResponse response) throws IOException {
        //查询数据库
        LocalDate dayBegin = LocalDate.now().minusDays(30);
        LocalDate dayEnd = LocalDate.now().plusDays(-1);
        LocalDateTime begin = LocalDateTime.of(dayBegin, LocalTime.MIN);
        LocalDateTime end = LocalDateTime.of(dayEnd, LocalTime.MAX);
        BusinessDataVO businessData = workspaceService.getBusinessData(begin, end);
        //poi写入excel文件

        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");


        XSSFWorkbook excel = new XSSFWorkbook(in);
        XSSFSheet sheet = excel.getSheetAt(0);
        XSSFRow row2 = sheet.getRow(1);
        row2.getCell(1).setCellValue("时间：" + dayBegin + "至" + dayEnd);

        XSSFRow row4 = sheet.getRow(3);
        row4.getCell(2).setCellValue(businessData.getTurnover());
        row4.getCell(4).setCellValue(businessData.getOrderCompletionRate());
        row4.getCell(6).setCellValue(businessData.getNewUsers());

        XSSFRow row5 = sheet.getRow(4);
        row5.getCell(2).setCellValue(businessData.getValidOrderCount());
        row5.getCell(4).setCellValue(businessData.getUnitPrice());

        //填充明细数据
        for (int i = 0; i < 30; i++) {
            LocalDate date = dayBegin.plusDays(i);
            BusinessDataVO businessData1 = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
            XSSFRow row = sheet.getRow(i + 7);
            row.getCell(1).setCellValue(date.toString());
            row.getCell(2).setCellValue(businessData1.getTurnover());
            row.getCell(3).setCellValue(businessData1.getValidOrderCount());
            row.getCell(4).setCellValue(businessData1.getOrderCompletionRate());
            row.getCell(5).setCellValue(businessData1.getUnitPrice());
            row.getCell(6).setCellValue(businessData1.getNewUsers());

        }

        //通过输出流下载到浏览器

        ServletOutputStream out = response.getOutputStream();
        excel.write(out);
        out.close();
        in.close();
        excel.close();
    }
}
